Senior dogs
Does a senior dog need fewer calories than before?
Last updated 23 September 2026 · How we write and check this
Short answer
In most cases yes, since resting metabolic rate and daily activity both tend to decrease with age, often by around 20 percent by the time a dog is well into its senior years. The exception is a senior dog that stays genuinely as active as before, or one that has started losing weight, both of which may need the same or even slightly more food rather than less overall.
The typical pattern
A dog that walked 5 km a day at age 4 but now manages a gentler 2 km burns noticeably fewer calories, even before accounting for the natural slowdown in metabolism itself. Feeding the same portion in that situation is one of the most common, and most easily fixed, reasons senior dogs gradually gain weight over a year or two.
Exceptions worth knowing
Some senior dogs, particularly those with a naturally lean build or a still-active lifestyle, do not need a reduction at all. A senior dog that is losing weight without a diet change needs more food or a vet check, not less, so calorie needs should always be judged against your own dog's condition rather than assumed automatically from age or breed alone.
How to judge it accurately
Feel along your dog's ribs monthly. You should be able to feel them with light pressure but not see them clearly, and there should be a visible waist when viewed from above. Adjust food up or down based on this rather than the calendar alone, since two dogs of the same age can need very different amounts.
Photographing your dog from directly above and from the side every month, in similar lighting, gives you a simple visual record to compare over time. Small changes are far easier to spot in a side by side comparison than by memory alone.
Key takeaways
- Most senior dogs need fewer calories as metabolism and activity decline.
- A dog that stays highly active may not need a reduction at all.
- Unexpected weight loss means a dog may need more food or a vet check, not less.
- Monthly rib and waist checks are a reliable way to judge whether the amount is right.